Factor the polynomial x3+3x2−4x^3 + 3x^2 - 4x3+3x2−4 completely.
(x−1)(x2+4x+4)(x-1)(x^2+4x+4)(x−1)(x2+4x+4)
(x+1)(x+2)2(x+1)(x+2)^2(x+1)(x+2)2
(x−1)(x+2)2(x-1)(x+2)^2(x−1)(x+2)2
(x+1)2(x−2)(x+1)^2(x-2)(x+1)2(x−2)